what is the difference between download files Pearcleaner file.zip and Pearcleaner-arm.zip? why the ARM has a smaller size?

[ospichev91-eng]

I downloaded the Pearcleaner file.zip and Pearcleaner-arm.zip . On my m1pro, they both start and run. But why does Pearcleaner-arm have a smaller size? if it's the same program.

[alienator88]

The arm file only has the M1 CPU architecture.
The regular zip has Intel as well which you don't need. So use the smaller one.